First thanks for the data you have posted, it always helps to see what you have.
The revision date on that document you mentioned (Jan 1967) was because the L35 engine was added to the document, not because of a change to the L48. I have a Chevy parts catalog dated Oct 1, 1966 and the 350 crank assembly listed has only one part number (3912355) and no cost listed. This is the same assembly listed in the Chevy parts catalogue #691A for 67 and 68 350 engines. I also have all of the 67 model year Chevy dealer service bulletins and they donít list any changes for the 350 crank. I have all of the Chevy Service News publications for 67 and they donít show any changes to the 350 crank.
My 67 Camaroís engine code is V1209MV. I have never had the bottom end apart, so I donít know what I have. If I have a reason to take it apart, I will check into what the crank is, but I really donít expect anything different than what is listed as stock.
You can email me any pictures you like at the higher resolution.